version 1.10, 2011/11/21 22:19:31
|
version 1.16, 2016/08/27 15:27:09
|
Line 1
|
Line 1
|
*> \brief \b DLAED7 |
*> \brief \b DLAED7 used by sstedc. Computes the updated eigensystem of a diagonal matrix after modification by a rank-one symmetric matrix. Used when the original matrix is dense. |
* |
* |
* =========== DOCUMENTATION =========== |
* =========== DOCUMENTATION =========== |
* |
* |
Line 59
|
Line 59
|
*> |
*> |
*> The first stage consists of deflating the size of the problem |
*> The first stage consists of deflating the size of the problem |
*> when there are multiple eigenvalues or if there is a zero in |
*> when there are multiple eigenvalues or if there is a zero in |
*> the Z vector. For each such occurence the dimension of the |
*> the Z vector. For each such occurrence the dimension of the |
*> secular equation problem is reduced by one. This stage is |
*> secular equation problem is reduced by one. This stage is |
*> performed by the routine DLAED8. |
*> performed by the routine DLAED8. |
*> |
*> |
Line 244
|
Line 244
|
*> \author Univ. of Colorado Denver |
*> \author Univ. of Colorado Denver |
*> \author NAG Ltd. |
*> \author NAG Ltd. |
* |
* |
*> \date November 2011 |
*> \date June 2016 |
* |
* |
*> \ingroup auxOTHERcomputational |
*> \ingroup auxOTHERcomputational |
* |
* |
Line 260
|
Line 260
|
$ PERM, GIVPTR, GIVCOL, GIVNUM, WORK, IWORK, |
$ PERM, GIVPTR, GIVCOL, GIVNUM, WORK, IWORK, |
$ INFO ) |
$ INFO ) |
* |
* |
* -- LAPACK computational routine (version 3.4.0) -- |
* -- LAPACK computational routine (version 3.6.1) -- |
* -- LAPACK is a software package provided by Univ. of Tennessee, -- |
* -- LAPACK is a software package provided by Univ. of Tennessee, -- |
* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..-- |
* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..-- |
* November 2011 |
* June 2016 |
* |
* |
* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
INTEGER CURLVL, CURPBM, CUTPNT, ICOMPQ, INFO, LDQ, N, |
INTEGER CURLVL, CURPBM, CUTPNT, ICOMPQ, INFO, LDQ, N, |
Line 304
|
Line 304
|
ELSE IF( N.LT.0 ) THEN |
ELSE IF( N.LT.0 ) THEN |
INFO = -2 |
INFO = -2 |
ELSE IF( ICOMPQ.EQ.1 .AND. QSIZ.LT.N ) THEN |
ELSE IF( ICOMPQ.EQ.1 .AND. QSIZ.LT.N ) THEN |
INFO = -4 |
INFO = -3 |
ELSE IF( LDQ.LT.MAX( 1, N ) ) THEN |
ELSE IF( LDQ.LT.MAX( 1, N ) ) THEN |
INFO = -9 |
INFO = -9 |
ELSE IF( MIN( 1, N ).GT.CUTPNT .OR. N.LT.CUTPNT ) THEN |
ELSE IF( MIN( 1, N ).GT.CUTPNT .OR. N.LT.CUTPNT ) THEN |